diff --git a/src/Cafe/CafeSystem.cpp b/src/Cafe/CafeSystem.cpp
index 8ca86adf..3ebc86a7 100644
--- a/src/Cafe/CafeSystem.cpp
+++ b/src/Cafe/CafeSystem.cpp
@@ -68,6 +68,8 @@
 // dependency to be removed
 #include "gui/guiWrapper.h"
 
+#include "Cafe/OS/libs/coreinit/coreinit_FS.h"
+
 std::string _pathToExecutable;
 std::string _pathToBaseExecutable;
 
@@ -792,6 +794,99 @@ namespace CafeSystem
 		sSystemRunning = false;
 	}
 
+	void PauseTitle()
+	{
+		if (!sSystemRunning)
+			return;
+		coreinit::SuspendAllThreads();
+		sSystemRunning = false;
+	}
+
+	void ResumeTitle(bool* runningThreads)
+	{
+		if (sSystemRunning)
+			return;
+
+		coreinit::ResumeAllThreads(runningThreads);
+		sSystemRunning = true;
+	}
+
+	void SaveState(std::string path)
+	{
+		cemuLog_log(LogType::Force, "[SAVESTATE] Saving state...");
+		MemStreamWriter writer(0);
+		// pause game
+		PauseTitle();
+		// memory
+		memory_Serialize(writer);
+		// gpu
+		writer.writeData(LatteGPUState.contextRegister, sizeof(LatteGPUState.contextRegister));
+		writer.writeData(LatteGPUState.contextRegisterShadowAddr, sizeof(LatteGPUState.contextRegister));
+		writer.writeData(LatteGPUState.sharedArea, sizeof(gx2GPUSharedArea_t));
+		// cpu
+		auto threads = coreinit::GetAllThreads();
+		for (auto& thr : threads)
+		{
+			writer.writeBE<bool>(thr != nullptr);
+			if (thr != nullptr)
+				writer.writeData(thr, sizeof(OSThread_t));
+		}
+		for (auto& thr : activeThread)
+		{
+			writer.writeBE(thr);
+		}
+		// fs
+		coreinit::FSSave(writer);
+		iosu::fsa::Save(writer);
+
+		FileStream* stream = FileStream::createFile(path);
+		stream->writeData(writer.getResult().data(), writer.getResult().size_bytes());
+		delete stream;
+		cemuLog_log(LogType::Force, "[SAVESTATE] Saved state to {}.", path);
+		ResumeTitle(/*isThreadRunning*/);
+	}
+
+	void LoadState(std::string path)
+	{
+		PauseTitle();
+		cemuLog_log(LogType::Force, "[SAVESTATE] Loading state...", path);
+
+		auto data = FileStream::LoadIntoMemory(path);
+		assert(data.has_value());
+		MemStreamReader reader(data->data(), data->size());
+		// memory
+		memory_Deserialize(reader);
+		// gpu
+		reader.readData(LatteGPUState.contextRegister, sizeof(LatteGPUState.contextRegister));
+		reader.readData(LatteGPUState.contextRegisterShadowAddr, sizeof(LatteGPUState.contextRegister));
+		reader.readData(LatteGPUState.sharedArea, sizeof(gx2GPUSharedArea_t));
+		// cpu
+		auto threads = coreinit::GetAllThreads();
+		for (auto& thr : threads)
+		{
+			bool notnull = reader.readBE<bool>();
+			if (notnull)
+			{
+				if (!thr)
+				{
+					thr = new OSThread_t;
+				}
+				reader.readData(thr, sizeof(OSThread_t));
+			}
+		}
+		for (size_t i = 0; i < 256; i++)
+		{
+			activeThread[i] = reader.readBE<uint32>();
+		}
+		// fs
+		coreinit::FSRestore(reader);
+		iosu::fsa::Restore(reader);
+
+		cemuLog_log(LogType::Force, "[SAVESTATE] Loaded state from {}.", path);
+
+		ResumeTitle(/*isThreadRunning*/);
+	}
+
 	/* Virtual mlc storage */
 
 	void InitVirtualMlcStorage()
diff --git a/src/Cafe/CafeSystem.h b/src/Cafe/CafeSystem.h
index 236cf44a..8be2355d 100644
--- a/src/Cafe/CafeSystem.h
+++ b/src/Cafe/CafeSystem.h
@@ -30,6 +30,12 @@ namespace CafeSystem
 
 	void ShutdownTitle();
 
+	void PauseTitle();
+	void ResumeTitle(bool* runningThreads = nullptr);
+
+	void SaveState(std::string path);
+	void LoadState(std::string path);
+
 	std::string GetMlcStoragePath(TitleId titleId);
 	void MlcStorageMountAllTitles();
 
diff --git a/src/Cafe/Filesystem/fsc.cpp b/src/Cafe/Filesystem/fsc.cpp
index b2500667..ec53673d 100644
--- a/src/Cafe/Filesystem/fsc.cpp
+++ b/src/Cafe/Filesystem/fsc.cpp
@@ -269,6 +269,8 @@ FSCMountPathNode* fsc_lookupPathVirtualNode(const char* path, sint32 priority)
 class FSCVirtualFileDirectoryIterator : public FSCVirtualFile
 {
 public:
+	void Save(MemStreamWriter& writer) override;
+
 	sint32 fscGetType() override
 	{
 		return FSC_TYPE_DIRECTORY;
@@ -717,3 +719,59 @@ void fsc_init()
 {
 	fsc_reset();
 }
+
+void FSCVirtualFile::Save(MemStreamWriter& writer)
+{
+	writer.writeBE(dirIterator != nullptr);
+	if (dirIterator) writer.writeBE(*dirIterator);
+}
+#include "Cafe/Filesystem/fscDeviceHostFS.h"
+
+FSCVirtualFile* FSCVirtualFile::Restore(MemStreamReader& reader)
+{
+	FSCVirtualFile* file;
+	switch ((Child)reader.readBE<uint32>())
+	{
+	case Child::DIRECTORY_ITERATOR:
+	{
+		std::string path = reader.readBE<std::string>();
+		std::vector<FSCVirtualFile*> folders{};
+		size_t size = reader.readBE<size_t>();
+		for (size_t i = 0; i < size; i++)
+		{
+			folders.push_back(Restore(reader));
+		}
+		file = new FSCVirtualFileDirectoryIterator(path, folders);
+		break;
+	}
+	case Child::HOST:
+	{
+		std::string path = reader.readBE<std::string>();
+		FSC_ACCESS_FLAG flags = (FSC_ACCESS_FLAG)reader.readBE<uint32>();
+		sint32 status{};
+		file = FSCVirtualFile_Host::OpenFile(path, flags, status);
+		file->fscSetSeek(reader.readBE<uint64>());
+		break;
+	}
+	default:
+		throw std::exception("Not implemented");
+	}
+	if (reader.readBE<bool>())
+	{
+		file->dirIterator = new FSCDirIteratorState;
+		*file->dirIterator = reader.readBE<FSCDirIteratorState>();
+	}
+	return file;
+}
+
+void FSCVirtualFileDirectoryIterator::Save(MemStreamWriter& writer)
+{
+	writer.writeBE<uint32>((uint32)Child::DIRECTORY_ITERATOR);
+	writer.writeBE(m_path);
+	writer.writeBE(m_folders.size());
+	for (auto& folder : m_folders)
+	{
+		folder->Save(writer);
+	}
+	FSCVirtualFile::Save(writer);
+}
\ No newline at end of file
diff --git a/src/Cafe/Filesystem/fsc.h b/src/Cafe/Filesystem/fsc.h
index 2854a301..b9ef6f84 100644
--- a/src/Cafe/Filesystem/fsc.h
+++ b/src/Cafe/Filesystem/fsc.h
@@ -89,12 +89,20 @@ public:
 
 struct FSCVirtualFile
 {
+	enum class Child : uint32
+	{
+		DIRECTORY_ITERATOR, HOST, WUACTX, WUDCTX, NONE
+	};
+
 	struct FSCDirIteratorState
 	{
 		sint32 index;
 		std::vector<FSCDirEntry> dirEntries;
 	};
 
+	virtual void Save(MemStreamWriter& writer);
+	static FSCVirtualFile* Restore(MemStreamReader& reader);
+
 	FSCVirtualFile()
 	{
 
diff --git a/src/Cafe/Filesystem/fscDeviceHostFS.cpp b/src/Cafe/Filesystem/fscDeviceHostFS.cpp
index f63d2920..2e1954d9 100644
--- a/src/Cafe/Filesystem/fscDeviceHostFS.cpp
+++ b/src/Cafe/Filesystem/fscDeviceHostFS.cpp
@@ -157,6 +157,19 @@ bool FSCVirtualFile_Host::fscDirNext(FSCDirEntry* dirEntry)
 	return true;
 }
 
+void FSCVirtualFile_Host::Save(MemStreamWriter& writer)
+{
+	writer.writeBE<uint32>((uint32)Child::HOST);
+
+	writer.writeBE(m_path->string());
+	writer.writeBE((uint32)m_accessFlags);
+
+	writer.writeBE(m_seek);
+
+	FSCVirtualFile::Save(writer);
+}
+
+
 FSCVirtualFile* FSCVirtualFile_Host::OpenFile(const fs::path& path, FSC_ACCESS_FLAG accessFlags, sint32& fscStatus)
 {
 	if (!HAS_FLAG(accessFlags, FSC_ACCESS_FLAG::OPEN_FILE) && !HAS_FLAG(accessFlags, FSC_ACCESS_FLAG::OPEN_DIR))
@@ -191,9 +204,11 @@ FSCVirtualFile* FSCVirtualFile_Host::OpenFile(const fs::path& path, FSC_ACCESS_F
 		if (fs)
 		{
 			FSCVirtualFile_Host* vf = new FSCVirtualFile_Host(FSC_TYPE_FILE);
+			vf->m_path.reset(new std::filesystem::path(path));
 			vf->m_fs = fs;
 			vf->m_isWritable = writeAccessRequested;
 			vf->m_fileSize = fs->GetSize();
+			vf->m_accessFlags = accessFlags;
 			fscStatus = FSC_STATUS_OK;
 			return vf;
 		}
@@ -208,6 +223,7 @@ FSCVirtualFile* FSCVirtualFile_Host::OpenFile(const fs::path& path, FSC_ACCESS_F
 		{
 			FSCVirtualFile_Host* vf = new FSCVirtualFile_Host(FSC_TYPE_DIRECTORY);
 			vf->m_path.reset(new std::filesystem::path(path));
+			vf->m_accessFlags = accessFlags;
 			fscStatus = FSC_STATUS_OK;
 			return vf;
 		}
diff --git a/src/Cafe/Filesystem/fscDeviceHostFS.h b/src/Cafe/Filesystem/fscDeviceHostFS.h
index 7121594c..6daab151 100644
--- a/src/Cafe/Filesystem/fscDeviceHostFS.h
+++ b/src/Cafe/Filesystem/fscDeviceHostFS.h
@@ -3,6 +3,7 @@
 class FSCVirtualFile_Host : public FSCVirtualFile
 {
 public:
+	void Save(MemStreamWriter& writer) override;
 	static FSCVirtualFile* OpenFile(const fs::path& path, FSC_ACCESS_FLAG accessFlags, sint32& fscStatus);
 	~FSCVirtualFile_Host() override;
 
@@ -31,4 +32,6 @@ private:
 	// directory
 	std::unique_ptr<std::filesystem::path> m_path{};
 	std::unique_ptr<std::filesystem::directory_iterator> m_dirIterator{};
+	// serialization
+	FSC_ACCESS_FLAG m_accessFlags;
 };
\ No newline at end of file
diff --git a/src/Cafe/Filesystem/fscDeviceWua.cpp b/src/Cafe/Filesystem/fscDeviceWua.cpp
index f9014bdb..5bea3715 100644
--- a/src/Cafe/Filesystem/fscDeviceWua.cpp
+++ b/src/Cafe/Filesystem/fscDeviceWua.cpp
@@ -15,6 +15,11 @@ protected:
 	};
 
 public:
+	void Save(MemStreamWriter& writer) override
+	{
+		throw std::exception("Not implemented");
+	}
+
 	sint32 fscGetType() override
 	{
 		return m_fscType;
diff --git a/src/Cafe/Filesystem/fscDeviceWud.cpp b/src/Cafe/Filesystem/fscDeviceWud.cpp
index bf43bf3e..70d9b5c9 100644
--- a/src/Cafe/Filesystem/fscDeviceWud.cpp
+++ b/src/Cafe/Filesystem/fscDeviceWud.cpp
@@ -22,6 +22,11 @@ protected:
 	}
 
 public:
+	void Save(MemStreamWriter& writer) override
+	{
+		throw std::exception("Not implemented");
+	}
+
 	sint32 fscGetType() override
 	{
 		return m_fscType;
diff --git a/src/Cafe/HW/MMU/MMU.cpp b/src/Cafe/HW/MMU/MMU.cpp
index 1a776d6b..e6b47838 100644
--- a/src/Cafe/HW/MMU/MMU.cpp
+++ b/src/Cafe/HW/MMU/MMU.cpp
@@ -80,6 +80,66 @@ MMURange* memory_getMMURangeByAddress(MPTR address)
 	return nullptr;
 }
 
+bool MMURange::serializeImpl(MemStreamWriter& streamWriter)
+{
+	streamWriter.writeBE<bool>(this->m_isMapped);
+	if (m_isMapped)
+	{
+		streamWriter.writeBE(this->baseAddress);
+		streamWriter.writeBE<uint8>((uint8)this->areaId);
+		streamWriter.writeBE<uint8>((uint8)this->flags);
+		streamWriter.writeBE(this->name);
+		streamWriter.writeBE(this->size);
+		streamWriter.writeBE(this->initSize);
+	}
+	return true;
+}
+
+template<>
+void MemStreamWriter::writeBE<MMURange>(const MMURange& v)
+{
+	writeBE(v.m_isMapped);
+	writeBE(v.baseAddress);
+	writeBE<uint8>((uint8)v.areaId);
+	writeBE<uint8>((uint8)v.flags);
+	writeBE(v.name);
+	writeBE(v.size);
+	writeBE(v.initSize);
+}
+
+template <>
+MMURange MemStreamReader::readBE<MMURange>()
+{
+	bool mapped = readBE<bool>();
+	uint32 base = readBE<uint32>();
+	MMU_MEM_AREA_ID areaid = (MMU_MEM_AREA_ID)readBE<uint8>();
+	MMURange::MFLAG flags = (MMURange::MFLAG)readBE<uint8>();
+	std::string name = readBE<std::string>();
+	uint32 size = readBE<uint32>();
+	uint32 initsize = readBE<uint32>();
+	MMURange range(base, size, areaid, name, flags);
+	if (mapped)
+		range.mapMem();
+	return range;
+}
+
+bool MMURange::deserializeImpl(MemStreamReader& streamReader)
+{
+	m_isMapped = streamReader.readBE<bool>();
+	if (m_isMapped)
+	{
+		baseAddress = streamReader.readBE<uint32>();
+		areaId = (MMU_MEM_AREA_ID)streamReader.readBE<uint8>();
+		this->flags = (MFLAG)streamReader.readBE<uint8>();
+		this->name = streamReader.readBE<std::string>();
+		this->size = streamReader.readBE<uint32>();
+		this->initSize = streamReader.readBE<uint32>();
+		m_isMapped = false;
+		mapMem();
+	}
+	return true;
+}
+
 MMURange::MMURange(const uint32 baseAddress, const uint32 size, MMU_MEM_AREA_ID areaId, const std::string_view name, MFLAG flags) : baseAddress(baseAddress), size(size), initSize(size), areaId(areaId), name(name), flags(flags)
 {
 	g_mmuRanges.emplace_back(this);
@@ -403,6 +463,35 @@ void memory_createDump()
 	}
 }
 
+void memory_Serialize(MemStreamWriter& s)
+{
+	s.writeBE<uint64>(g_mmuRanges.size());
+	for (auto& itr : g_mmuRanges)
+	{
+		s.writeBE(*itr);
+		if (itr->isMapped())
+		{
+			s.writeData(memory_base + itr->getBase(), itr->getSize());
+		}
+	}
+}
+
+void memory_Deserialize(MemStreamReader& s)
+{
+	g_mmuRanges.clear();
+	size_t cnt = s.readBE<uint64>();
+	for (size_t i = 0; i < cnt; i++)
+	{
+		auto range = s.readBE<MMURange>();
+		bool mapped = range.isMapped();
+		if (mapped)
+		{
+			s.readData(memory_base + range.getBase(), range.getSize());
+		}
+		g_mmuRanges.push_back(std::move(&range));
+	}
+}
+
 namespace MMU
 {
 	// MMIO access handler
diff --git a/src/Cafe/HW/MMU/MMU.h b/src/Cafe/HW/MMU/MMU.h
index 222e8c0e..d03307a9 100644
--- a/src/Cafe/HW/MMU/MMU.h
+++ b/src/Cafe/HW/MMU/MMU.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "util/helpers/Serializer.h"
+
 void memory_init();
 void memory_mapForCurrentTitle();
 void memory_logModifiedMemoryRanges();
@@ -48,6 +50,9 @@ struct MMURange
 		FLAG_MAP_EARLY = (1 << 1), // map at Cemu launch, normally memory is mapped when a game is loaded
 	};
 
+	bool serializeImpl(MemStreamWriter& streamWriter);
+	bool deserializeImpl(MemStreamReader& streamReader);
+
 	MMURange(const uint32 baseAddress, const uint32 size, MMU_MEM_AREA_ID areaId, const std::string_view name, MFLAG flags = (MFLAG)0);
 
 	void mapMem();
@@ -107,14 +112,16 @@ struct MMURange
 	bool isOptional() const { return (flags & MFLAG::FLAG_OPTIONAL) != 0; };
 	bool isMappedEarly() const { return (flags & MFLAG::FLAG_MAP_EARLY) != 0; };
 
-	const uint32 baseAddress;
-	const uint32 initSize; // initial size
-	const std::string name;
-	const MFLAG flags;
-	const MMU_MEM_AREA_ID areaId;
+	uint32 baseAddress;
+	uint32 initSize; // initial size
+	std::string name;
+	MFLAG flags;
+	MMU_MEM_AREA_ID areaId;
 	// runtime parameters
 	uint32 size;
 	bool m_isMapped{};
+	friend class MemStreamWriter;
+	friend class MemStreamReader;
 };
 
 
@@ -202,6 +209,9 @@ uint8 memory_readU8(uint32 address);
 
 void memory_createDump();
 
+void memory_Serialize(MemStreamWriter& s);
+void memory_Deserialize(MemStreamReader& s);
+
 template<size_t count>
 void memory_readBytes(VAddr address, std::array<uint8, count>& buffer)
 {
diff --git a/src/Cafe/IOSU/fsa/iosu_fsa.cpp b/src/Cafe/IOSU/fsa/iosu_fsa.cpp
index 1429d083..e2cf8988 100644
--- a/src/Cafe/IOSU/fsa/iosu_fsa.cpp
+++ b/src/Cafe/IOSU/fsa/iosu_fsa.cpp
@@ -169,6 +169,8 @@ namespace iosu
 		}
 
 		class _FSAHandleTable {
+			friend class MemStreamWriter;
+			friend class MemStreamReader;
 			struct _FSAHandleResource
 			{
 				bool isAllocated{false};
@@ -904,3 +906,109 @@ namespace iosu
 		}
 	} // namespace fsa
 } // namespace iosu
+
+template <>
+void MemStreamWriter::writeBE<FSCDirEntry>(const FSCDirEntry& v);
+template <>
+FSCDirEntry MemStreamReader::readBE<FSCDirEntry>();
+template <>
+FSCVirtualFile::FSCDirIteratorState MemStreamReader::readBE<FSCVirtualFile::FSCDirIteratorState>();
+template <>
+void MemStreamWriter::writeBE<FSCVirtualFile::FSCDirIteratorState>(const FSCVirtualFile::FSCDirIteratorState& v);
+
+template <>
+void MemStreamWriter::writeBE<iosu::fsa::_FSAHandleTable>(const iosu::fsa::_FSAHandleTable& v)
+{
+	writeBE(v.m_currentCounter);
+	for (int i = 0; i < 0x3C0; i++)
+	{
+		writeBE(v.m_handleTable[i].handleCheckValue);
+		writeBE(v.m_handleTable[i].isAllocated);
+		writeBE(v.m_handleTable[i].fscFile != nullptr);
+		if (v.m_handleTable[i].fscFile != nullptr) v.m_handleTable[i].fscFile->Save(*this);
+	}
+}
+
+template <>
+iosu::fsa::_FSAHandleTable MemStreamReader::readBE<iosu::fsa::_FSAHandleTable>()
+{
+	iosu::fsa::_FSAHandleTable table{};
+	table.m_currentCounter = readBE<uint32>();
+	for (int i = 0; i < 0x3C0; i++)
+	{
+		table.m_handleTable[i].handleCheckValue = readBE<uint16>();
+		table.m_handleTable[i].isAllocated = readBE<bool>();
+		if (readBE<bool>()) table.m_handleTable[i].fscFile = FSCVirtualFile::Restore(*this);
+	}
+	return table;
+}
+
+template <>
+void MemStreamWriter::writeBE<FSCVirtualFile::FSCDirIteratorState>(const FSCVirtualFile::FSCDirIteratorState& v)
+{
+	writeBE(v.index);
+	writeBE(v.dirEntries.size());
+	for (int i = 0; i < v.dirEntries.size(); i++)
+	{
+		writeBE(v.dirEntries[i]);
+	}
+}
+
+template <>
+void MemStreamWriter::writeBE<FSCDirEntry>(const FSCDirEntry& v)
+{
+	writeData(v.path, FSC_MAX_DIR_NAME_LENGTH);
+	writeBE(v.isDirectory);
+	writeBE(v.isFile);
+	writeBE(v.fileSize);
+}
+
+template <>
+FSCDirEntry MemStreamReader::readBE<FSCDirEntry>()
+{
+	FSCDirEntry entry{};
+	readData(entry.path, FSC_MAX_DIR_NAME_LENGTH);
+	entry.isDirectory = readBE<bool>();
+	entry.isFile = readBE<bool>();
+	entry.fileSize = readBE<uint32>();
+	return entry;
+}
+
+template <>
+FSCVirtualFile::FSCDirIteratorState MemStreamReader::readBE<FSCVirtualFile::FSCDirIteratorState>()
+{
+	FSCVirtualFile::FSCDirIteratorState state{};
+	state.index = readBE<sint32>();
+	size_t size = readBE<size_t>();
+	for (size_t i = 0; i < size; i++)
+	{
+		state.dirEntries[i] = readBE<FSCDirEntry>();
+	}
+	return state;
+}
+
+namespace iosu::fsa
+{
+
+	void Save(MemStreamWriter& writer)
+	{
+		writer.writeBE(sFSAIoMsgQueue);
+		for (size_t i = 0; i < 352; i++)
+		{
+			writer.writeBE(_m_sFSAIoMsgQueueMsgBuffer[i]);
+		}
+		writer.writeBE(sDirHandleTable);
+		writer.writeBE(sFileHandleTable);
+	}
+
+	void Restore(MemStreamReader& reader)
+	{
+		sFSAIoMsgQueue = reader.readBE<IOSMsgQueueId>();
+		for (size_t i = 0; i < 352; i++)
+		{
+			_m_sFSAIoMsgQueueMsgBuffer[i] = reader.readBE<iosu::kernel::IOSMessage>();
+		}
+		sDirHandleTable = reader.readBE<_FSAHandleTable>();
+		sFileHandleTable = reader.readBE<_FSAHandleTable>();
+	}
+}
\ No newline at end of file
diff --git a/src/Cafe/IOSU/fsa/iosu_fsa.h b/src/Cafe/IOSU/fsa/iosu_fsa.h
index 8181a4a8..d5fb2118 100644
--- a/src/Cafe/IOSU/fsa/iosu_fsa.h
+++ b/src/Cafe/IOSU/fsa/iosu_fsa.h
@@ -213,5 +213,8 @@ namespace iosu
 
 		void Initialize();
 		void Shutdown();
+
+		void Save(MemStreamWriter& writer);
+		void Restore(MemStreamReader& reader);
 	} // namespace fsa
 } // namespace iosu
diff --git a/src/Cafe/OS/libs/coreinit/coreinit_FS.cpp b/src/Cafe/OS/libs/coreinit/coreinit_FS.cpp
index 26636eae..70c047a4 100644
--- a/src/Cafe/OS/libs/coreinit/coreinit_FS.cpp
+++ b/src/Cafe/OS/libs/coreinit/coreinit_FS.cpp
@@ -2638,6 +2638,16 @@ namespace coreinit
 		return FSA_RESULT::OK;
 	}
 
+	void FSSave(MemStreamWriter& s)
+	{
+		s.writeData(g_fsRegisteredClientBodies, sizeof(FSClientBody_t));
+	}
+
+	void FSRestore(MemStreamReader& s)
+	{
+		s.readData(g_fsRegisteredClientBodies, sizeof(FSClientBody_t));
+	}
+
 	void InitializeFS()
 	{
 		cafeExportRegister("coreinit", FSInit, LogType::CoreinitFile);
diff --git a/src/Cafe/OS/libs/coreinit/coreinit_FS.h b/src/Cafe/OS/libs/coreinit/coreinit_FS.h
index 0355c9aa..6a0bf9b3 100644
--- a/src/Cafe/OS/libs/coreinit/coreinit_FS.h
+++ b/src/Cafe/OS/libs/coreinit/coreinit_FS.h
@@ -308,5 +308,8 @@ namespace coreinit
 
 	FS_VOLSTATE FSGetVolumeState(FSClient_t* fsClient);
 
+	void FSSave(MemStreamWriter& s);
+	void FSRestore(MemStreamReader& s);
+
 	void InitializeFS();
 }; // namespace coreinit
diff --git a/src/Cafe/OS/libs/coreinit/coreinit_Thread.cpp b/src/Cafe/OS/libs/coreinit/coreinit_Thread.cpp
index b97f896e..ab82175b 100644
--- a/src/Cafe/OS/libs/coreinit/coreinit_Thread.cpp
+++ b/src/Cafe/OS/libs/coreinit/coreinit_Thread.cpp
@@ -198,6 +198,65 @@ namespace coreinit
 		return __currentCoreThread[currentInstance->spr.UPIR];
 	}
 
+	void SuspendAllThreads()
+	{
+		for (auto& thr : activeThread)
+		{
+			auto* ptr = (OSThread_t*)memory_getPointerFromVirtualOffset(thr);
+			if (thr != 0)
+			{
+				OSSuspendThread(ptr);
+			}
+		}
+		if (__currentCoreThread[0])
+			OSSuspendThread(__currentCoreThread[0]);
+		if (__currentCoreThread[1])
+			OSSuspendThread(__currentCoreThread[1]);
+		if (__currentCoreThread[2])
+			OSSuspendThread(__currentCoreThread[2]);
+
+	}
+
+	void ResumeAllThreads(bool* runningThreads)
+	{
+		for (auto& thr : activeThread)
+		{
+			int i = 0;
+			auto* ptr = (OSThread_t*)memory_getPointerFromVirtualOffset(thr);
+			if (thr != 0)
+			{
+				if (runningThreads && runningThreads[i])
+				{
+					if (s_threadToFiber.find(ptr) == s_threadToFiber.end())
+						__OSCreateHostThread(ptr);
+					OSResumeThread(ptr);
+				}
+				else if (!runningThreads)
+				{
+					if (s_threadToFiber.find(ptr) == s_threadToFiber.end())
+						__OSCreateHostThread(ptr);
+					OSResumeThread(ptr);
+				}
+			}
+			i++;
+		}
+		if (__currentCoreThread[0])
+			OSResumeThread(__currentCoreThread[0]);
+		if (__currentCoreThread[1])
+			OSResumeThread(__currentCoreThread[1]);
+		if (__currentCoreThread[2])
+			OSResumeThread(__currentCoreThread[2]);
+	}
+
+	std::vector<OSThread_t*> GetAllThreads()
+	{
+		auto ret = std::vector<OSThread_t*>();
+		ret.push_back(__currentCoreThread[0]);
+		ret.push_back(__currentCoreThread[1]);
+		ret.push_back(__currentCoreThread[2]);
+		return ret;
+	}
+
 	MPTR funcPtr_threadEntry = 0;
 
 	void threadEntry(PPCInterpreter_t* hCPU)
diff --git a/src/Cafe/OS/libs/coreinit/coreinit_Thread.h b/src/Cafe/OS/libs/coreinit/coreinit_Thread.h
index 7c1e618b..d04b8ee4 100644
--- a/src/Cafe/OS/libs/coreinit/coreinit_Thread.h
+++ b/src/Cafe/OS/libs/coreinit/coreinit_Thread.h
@@ -524,6 +524,9 @@ namespace coreinit
 
 	sint32 __OSResumeThreadInternal(OSThread_t* thread, sint32 resumeCount);
 	sint32 OSResumeThread(OSThread_t* thread);
+	void SuspendAllThreads();
+	void ResumeAllThreads(bool* runningThreads);
+	std::vector<OSThread_t*> GetAllThreads();
 	void OSContinueThread(OSThread_t* thread);
 	void __OSSuspendThreadInternal(OSThread_t* thread);
 	void __OSSuspendThreadNolock(OSThread_t* thread);
diff --git a/src/gui/MainWindow.cpp b/src/gui/MainWindow.cpp
index 142d5ef3..33b4b7d6 100644
--- a/src/gui/MainWindow.cpp
+++ b/src/gui/MainWindow.cpp
@@ -83,6 +83,8 @@ enum
 	MAINFRAME_MENU_ID_FILE_LOAD = 20100,
 	MAINFRAME_MENU_ID_FILE_INSTALL_UPDATE,
 	MAINFRAME_MENU_ID_FILE_OPEN_CEMU_FOLDER,
+	MAINFRAME_MENU_ID_FILE_SAVESTATE,
+	MAINFRAME_MENU_ID_FILE_LOADSTATE,
 	MAINFRAME_MENU_ID_FILE_EXIT,
 	MAINFRAME_MENU_ID_FILE_END_EMULATION,
 	MAINFRAME_MENU_ID_FILE_RECENT_0,
@@ -131,6 +133,13 @@ enum
 	MAINFRAME_MENU_ID_NFC_TOUCH_NFC_FILE = 21000,
 	MAINFRAME_MENU_ID_NFC_RECENT_0,
 	MAINFRAME_MENU_ID_NFC_RECENT_LAST = MAINFRAME_MENU_ID_NFC_RECENT_0 + 15,
+
+	// savestates
+	MAINFRAME_MENU_ID_SAVESTATES_PAUSE_TITLE,
+	MAINFRAME_MENU_ID_SAVESTATES_RESUME_TITLE,
+	MAINFRAME_MENU_ID_SAVESTATES_SAVE_STATE,
+	MAINFRAME_MENU_ID_SAVESTATES_LOAD_STATE,
+
 	// debug
 	MAINFRAME_MENU_ID_DEBUG_RENDER_UPSIDE_DOWN = 21100,
 	MAINFRAME_MENU_ID_DEBUG_VIEW_LOGGING_WINDOW,
@@ -174,6 +183,7 @@ EVT_MOVE(MainWindow::OnMove)
 EVT_MENU(MAINFRAME_MENU_ID_FILE_LOAD, MainWindow::OnFileMenu)
 EVT_MENU(MAINFRAME_MENU_ID_FILE_INSTALL_UPDATE, MainWindow::OnInstallUpdate)
 EVT_MENU(MAINFRAME_MENU_ID_FILE_OPEN_CEMU_FOLDER, MainWindow::OnOpenCemuFolder)
+
 EVT_MENU(MAINFRAME_MENU_ID_FILE_EXIT, MainWindow::OnFileExit)
 EVT_MENU(MAINFRAME_MENU_ID_FILE_END_EMULATION, MainWindow::OnFileMenu)
 EVT_MENU_RANGE(MAINFRAME_MENU_ID_FILE_RECENT_0 + 0, MAINFRAME_MENU_ID_FILE_RECENT_LAST, MainWindow::OnFileMenu)
@@ -204,6 +214,11 @@ EVT_MENU(MAINFRAME_MENU_ID_TIMER_SPEED_0125X, MainWindow::OnDebugSetting)
 // nfc menu
 EVT_MENU(MAINFRAME_MENU_ID_NFC_TOUCH_NFC_FILE, MainWindow::OnNFCMenu)
 EVT_MENU_RANGE(MAINFRAME_MENU_ID_NFC_RECENT_0 + 0, MAINFRAME_MENU_ID_NFC_RECENT_LAST, MainWindow::OnNFCMenu)
+// savestates menu
+EVT_MENU(MAINFRAME_MENU_ID_SAVESTATES_PAUSE_TITLE, MainWindow::OnSavestatesMenu)
+EVT_MENU(MAINFRAME_MENU_ID_SAVESTATES_RESUME_TITLE, MainWindow::OnSavestatesMenu)
+EVT_MENU(MAINFRAME_MENU_ID_SAVESTATES_SAVE_STATE, MainWindow::OnSavestatesMenu)
+EVT_MENU(MAINFRAME_MENU_ID_SAVESTATES_LOAD_STATE, MainWindow::OnSavestatesMenu)
 // debug -> logging menu
 EVT_MENU_RANGE(MAINFRAME_MENU_ID_DEBUG_LOGGING0 + 0, MAINFRAME_MENU_ID_DEBUG_LOGGING0 + 98, MainWindow::OnDebugLoggingToggleFlagGeneric)
 EVT_MENU(MAINFRAME_MENU_ID_DEBUG_ADVANCED_PPC_INFO, MainWindow::OnPPCInfoToggle)
@@ -778,6 +793,27 @@ void MainWindow::OnNFCMenu(wxCommandEvent& event)
 	}
 }
 
+void MainWindow::OnSavestatesMenu(wxCommandEvent& event)
+{
+	const auto menuId = event.GetId();
+	if (menuId == MAINFRAME_MENU_ID_SAVESTATES_PAUSE_TITLE)
+	{
+		CafeSystem::PauseTitle();
+	}
+	if (menuId == MAINFRAME_MENU_ID_SAVESTATES_RESUME_TITLE)
+	{
+		CafeSystem::ResumeTitle();
+	}
+	else if (menuId == MAINFRAME_MENU_ID_SAVESTATES_SAVE_STATE)
+	{
+		CafeSystem::SaveState("state.bin");
+	}
+	else if (menuId == MAINFRAME_MENU_ID_SAVESTATES_LOAD_STATE)
+	{
+		CafeSystem::LoadState("state.bin");
+	}
+}
+
 void MainWindow::OnFileExit(wxCommandEvent& event)
 {
 	// todo: Safely clean up everything
@@ -2184,6 +2220,16 @@ void MainWindow::RecreateMenu()
 	nfcMenu->Append(MAINFRAME_MENU_ID_NFC_TOUCH_NFC_FILE, _("&Scan NFC tag from file"))->Enable(false);
 	m_menuBar->Append(nfcMenu, _("&NFC"));
 	m_nfcMenuSeparator0 = nullptr;
+
+	// savestates menu
+	wxMenu* savestatesMenu = new wxMenu;
+	savestatesMenu->Append(MAINFRAME_MENU_ID_SAVESTATES_PAUSE_TITLE, _("&Pause"), wxEmptyString);
+	savestatesMenu->Append(MAINFRAME_MENU_ID_SAVESTATES_RESUME_TITLE, _("&Resume"), wxEmptyString);
+	savestatesMenu->AppendSeparator();
+	savestatesMenu->Append(MAINFRAME_MENU_ID_SAVESTATES_SAVE_STATE, _("&Save state"), wxEmptyString);
+	savestatesMenu->Append(MAINFRAME_MENU_ID_SAVESTATES_LOAD_STATE, _("&Load state"), wxEmptyString);
+	m_menuBar->Append(savestatesMenu, _("&Savestates"));
+
 	// debug->logging submenu
 	wxMenu* debugLoggingMenu = new wxMenu;
 
diff --git a/src/gui/MainWindow.h b/src/gui/MainWindow.h
index 735f73af..610fbcac 100644
--- a/src/gui/MainWindow.h
+++ b/src/gui/MainWindow.h
@@ -93,6 +93,7 @@ public:
 	void OnInstallUpdate(wxCommandEvent& event);
 	void OnFileExit(wxCommandEvent& event);
 	void OnNFCMenu(wxCommandEvent& event);
+	void OnSavestatesMenu(wxCommandEvent& event);
 	void OnOptionsInput(wxCommandEvent& event);
 	void OnAccountSelect(wxCommandEvent& event);
 	void OnConsoleLanguage(wxCommandEvent& event);
@@ -227,6 +228,12 @@ private:
 	wxMenu* m_nfcMenu;
 	wxMenuItem* m_nfcMenuSeparator0;
 
+	// savestates
+	//wxMenuItem* m_pause;
+	//wxMenuItem* m_resume;
+	//wxMenuItem* m_saveState;
+	//wxMenuItem* m_loadState;
+
 	// debug
 	wxMenu* m_debugMenu;
 	wxMenu* m_loggingSubmenu;
diff --git a/src/util/helpers/Serializer.cpp b/src/util/helpers/Serializer.cpp
index e9e60b0a..8e162c30 100644
--- a/src/util/helpers/Serializer.cpp
+++ b/src/util/helpers/Serializer.cpp
@@ -36,6 +36,19 @@ uint32 MemStreamReader::readBE()
 	return v;
 }
 
+template<>
+sint32 MemStreamReader::readBE()
+{
+	if (!reserveReadLength(sizeof(sint32)))
+		return 0;
+	const uint8* p = m_data + m_cursorPos;
+	sint32 v;
+	std::memcpy(&v, p, sizeof(v));
+	v = _BE(v);
+	m_cursorPos += sizeof(sint32);
+	return v;
+}
+
 template<>
 uint64 MemStreamReader::readBE()
 {
@@ -117,6 +130,14 @@ void MemStreamWriter::writeBE<uint32>(const uint32& v)
 	std::memcpy(p, &tmp, sizeof(tmp));
 }
 
+template<>
+void MemStreamWriter::writeBE<sint32>(const sint32& v)
+{
+	m_buffer.resize(m_buffer.size() + 4);
+	uint8* p = m_buffer.data() + m_buffer.size() - 4;
+	uint32 tmp = _BE(v);
+	std::memcpy(p, &tmp, sizeof(tmp));
+}
 
 template<>
 void MemStreamWriter::writeBE<uint16>(const uint16& v)
@@ -134,6 +155,19 @@ void MemStreamWriter::writeBE<uint8>(const uint8& v)
 	m_buffer.emplace_back(v);
 }
 
+template<>
+void MemStreamWriter::writeBE<bool>(const bool& v)
+{
+	writeData(&v, sizeof(bool));
+}
+
+template<>
+bool MemStreamReader::readBE<bool>()
+{
+	bool v{ false };
+	readData(&v, sizeof(bool));
+	return v;
+}
 
 template<>
 void MemStreamWriter::writeBE<std::string>(const std::string& v)